The company said it had restructured its agreement with Abbott Laboratories
ABT, +0.75%
that will allow it to assume full marketing responsibility for Medimmune's respiratory drug Synagis beginning in July 2006.

As a result, Medimmune raised its 2007 earnings forecast by 28 cents a share to $1.15. Wall Street estimates had put the company's earning at about 70 cents. The deal, however, will lower earnings for 2005 and 2006 by about 10 cents and 11 cents, respectively.

Tercica
TRCA
surged 21% to $11.31. The Food and Drug Administration granted approval for its first commercial drug, Increlex, a treatment for growth deficiency in children.See full story.

ImmunoGen
IMGN, +2.12%
got a boost out of news that it had extended its collaboration with Sanofi-Aventis
SNY, +1.68%
Under the deal, the European drug maker will give Immunogen $18.2 million over the next 12 months.See full story.

ImmuGen hopped 7% to $6.35.

Stemcells Inc.
STEM
rose 5% to $5.45. The company said California regulators have granted a manufacturing license to the company for its new cell processing facility.

Chiron
CHIR
gained 1% to $36.44 after announcing that the FDA has indicated the company's flu vaccine plant in Liverpool, England, is up to code. Chiron said it has already begun production of flu vaccine for the 2005-06 flu season.See full story.

The FDA also approved GlaxoSmithKline's
GSK, +0.75%
flu vaccine Fluarix for the upcoming flu season. Shares of Glaxo were up 1.4% at $48.72.

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